高电压技术2025，Vol.51Issue(2)：593-604,中插12-中插15,16.DOI:10.13336/j.1003-6520.hve.20241060
双馈风电场柔直并网系统的近工频振荡分析与抑制
Analysis and Suppression of Near Fundamental-frequency Oscillation in DFIG-based Wind Farm Connected with MMC-HVDC Transmission System
摘要
Abstract
In order to reveal the mechanism of near fundamental-frequency(NFF)oscillation in the doubly-fed induction generator(DFIG)based wind farms connected with modular multilevel converter based high-voltage DC(MMC-HVDC)transmission system,we proposed an effective NFF oscillation suppression strategy,and established the detailed imped-ance models of DFIG-based wind turbine generator(WTG)and wind farm side MMC considering negative-sequence control loops based on harmonic state-space method,which were validated by frequency-scanning.Then,the mechanism and the key influencing factors of the NFF positive-and negative-sequence oscillations of the MMC-HVDC connected DFIG-based wind farm were revealed by using the impedance analysis method.The research results show that the phase-locked loop(PLL)and current inner loop of DFIG-WTG are the key influencing factors of the NFF oscillation.On this basis,an NFF oscillation suppression method for wind farm connected with MMC-HVDC transmission system was proposed.The method adds a damping loop to the PLL of WTG to realize NFF positive-sequence oscillation suppression.Finally,the NFF oscillation phenomena in the practical system were reproduced and the effectiveness of the proposed os-cillation suppression method was verified by time-domain simulations.关键词
柔性直流输电/双馈风电机组/正序振荡/负序振荡/锁相环/谐波状态空间Key words
flexible DC transmission/DFIG-based wind turbine generator/positive-sequence oscillation/nega-tive-sequence oscillation/phase-locked loop/harmonic state-space引用本文复制引用
杨煜,吕敬,王潇,王干尧,蔡旭..双馈风电场柔直并网系统的近工频振荡分析与抑制[J].高电压技术,2025,51(2):593-604,中插12-中插15,16.基金项目
国家电网有限公司科技项目(4000-202314461A-3-2-ZN).Project supported by Science and Technology Project of SGCC(4000-202314461A-3-2-ZN). （4000-202314461A-3-2-ZN）
